The QFA series field tubular parallel surge protectors are used to protect signal detection and control equipment, preventing external interference such as transient surges and transient voltages caused by lightning strikes or high-voltage switching. By discharging transient currents to earth, the voltage between signal lines is clamped at a safe level, ensuring normal signal transmission.<\/p>\n
Ordering code:<\/strong>QFA-24-230-\u25a1; \u25a1: N=1\/2″NPT, I=M20\u00d71.5, X\/Y\/Z for custom threads.<\/p>","protected":false},"excerpt":{"rendered":" For four-wire instruments supplied at 220 V AC, etc. Function: line-to-line low residual voltage protection, for LPZ0B to LPZ2 zones and subsequent zone boundaries.<\/p>","protected":false},"featured_media":8584,"template":"","meta":{"iifk_footer_enabled":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"product-category":[26,16],"industry":[1894,45,68],"brand":[77],"class_list":["post-8586","product","type-product","status-publish","has-post-thumbnail","hentry","product-category-signal-conditioning","product-category-spd","industry-1894","industry-petrochemical","industry-process-automation","brand-qison"],"_links":{"self":[{"href":"https:\/\/www.qishan-sh.com\/en\/wp-json\/wp\/v2\/product\/8586","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.qishan-sh.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.qishan-sh.com\/en\/wp-json\/wp\/v2\/types\/product"}],"version-history":[{"count":1,"href":"https:\/\/www.qishan-sh.com\/en\/wp-json\/wp\/v2\/product\/8586\/revisions"}],"predecessor-version":[{"id":8587,"href":"https:\/\/www.qishan-sh.com\/en\/wp-json\/wp\/v2\/product\/8586\/revisions\/8587"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.qishan-sh.com\/en\/wp-json\/wp\/v2\/media\/8584"}],"wp:attachment":[{"href":"https:\/\/www.qishan-sh.com\/en\/wp-json\/wp\/v2\/media?parent=8586"}],"wp:term":[{"taxonomy":"product-category","embeddable":true,"href":"https:\/\/www.qishan-sh.com\/en\/wp-json\/wp\/v2\/product-category?post=8586"},{"taxonomy":"industry","embeddable":true,"href":"https:\/\/www.qishan-sh.com\/en\/wp-json\/wp\/v2\/industry?post=8586"},{"taxonomy":"brand","embeddable":true,"href":"https:\/\/www.qishan-sh.com\/en\/wp-json\/wp\/v2\/brand?post=8586"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}